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OTC Level Sensors


Real-Time Storage Tank Emission Detection Solution

SX1000-T10 | SX1000-T30


Real-time thief hatch monitoring detection system

Offered in 10 ft or 30 ft wire length

Designed to work with OleumTech wireless instruments with a Discrete Input (DI) for deploying wireless emissions detection system

Quick and easy to install

Works with OleumTech Liquid Level Transmitters with a discrete input

Works with the IO MAX® Transmitter (MX1)

Works with Wireless Discrete Transmitters (DS1 /  DJ1)


  • Latch Switch Pin
  • Magnetic Trigger Hinge Pin
  • 10 ft or 30 ft cable for wiring to Liquid Level Transmitter: WT-xxxx-LL3-D (LL3-DT), SM5x00-RL2 (RL2-T), Discrete Transmitters: WT-xxxx-DS1 / SM5x00-DJ1 (DS1)

The Thief Hatch Switch Kit consists of a latch switch pin and a magnetic trigger hinge pin along a 10 or 30 ft outdoor-rated wiring. The switch wires are then attached to a discrete input available on the Transmitter. When the Transmitter powers up, it checks to see if the circuit is “closed” or “open.” The circuit is only closed when the hatch is properly latched. If the latch is not closed or the sensor wires have been damaged or disconnected, the Transmitter will send an “open” signal.

Real-Time Monitoring

The Thief Hatch Switch Kit is a turnkey solution for monitoring and instantly detecting open or closed status of a thief hatch when used with an OleumTech Liquid Level Transmitters or Discrete Transmitters. In addition, these Transmitters have ability to keep count the number of times thief hatch was opened and closed.

Storage Tank Emission Detection

Monitoring the open/close status of the thief hatch is one of the easiest method to be alerted of a possible emission leak. This kit truly helps prevent costly fines and helps our environment to stay greener.